The kerbstones were already there.  The garden centre is on the way out of Tortosa towards L'Aldea on the right hand side - La Senia.  BEWARE though, the majority of garden centres sell plants that will die as they aren't suitable for the area as they cannot tolerate the heat or lack of water.  You can (as many people have done) spend a fortune on plants that will just die.  Do your homework - get the FULL latin name for the plant and make sure that it is drought tolerant. For example, a lavender. In the catalogue we have there are 47 different types that vary in size/colour/suitability. Buy a plant that says it's lavender and you could be wasting your money!

There is a garden centre in Amposta called Culti Delta that only sells mediterranean plants - open to the public on Saturday mornings only. It's on the internet if you look.

Nigel